No unnecessary antimicrobial chemicals added; Filtrete filtering material will not support the growth of bacteria, mold, mildew or fungi in normal use

Contains electrostatically charged media to filter and attract particles in the air

Attracts and captures large allergens like:

Pollen

Mold spores

Dust mite debris

Attracts and captures microscopic allergens like:

Smoke

Pet dander

Household dust

Smog

* This filter should be changed at least every 3 months. Certain conditions in your home will significantly add particles to the air - this will cause the filter to capture more particles, shortening it's life to less than 3 months. These conditions would include: dirty ductwork, pets, construction work, sanding projects, tobacco smoke, burning candles, fireplaces and wood-burning stoves.

WHY USE MPR RATHER THAN MERV RATING?

The Heating, Ventilating and Air Conditioning (HVAC) industry uses the ASHRAE 52.2 Standard, which assigns a Minimum Efficiency Reporting Value (MERV) to a filter. One part of MERV reports a filter's ability to capture medium to large particles between 1 and 10 microns. This value is helpful in comparing the performance of different filters but it is not adequate alone because particles greater than one micron make up only about 1% of the contaminants in your indoor air.

Another part of MERV addresses submicron particles. 3M calls this the MPR or Microparticle Performance Rating. It measures a filter's ability to capture particles between 0.3 and 1.0 micron. Based on independent laboratory tests, 3M's MPR measures a filter's ability to capture submicron particles that make up 99% of the particles in the air, such as bacteria, smoke and smog.

I have bad allergies to the pollen in my area. I used these filters for 5 yrs, often running 24/7, as a whole-house filter. It really helped keep my allergies in check. I've recommended them to friends & co-workers as well, with good results.

The do clog up pretty quick, restricting the ac flow. During heavy use, I had to replace every month. Very much worth it for the health benefits.

I have bad allergies to the pollen in my area. I used these filters for 5 yrs, often running 24/7, as a whole-house filter. It really helped keep my allergies in check. I've recommended them to friends & co-workers as well, with good results.

The do clog up pretty quick, restricting the ac flow. During heavy use, I had to replace every month. Very much worth it for the health benefits.

No unnecessary antimicrobial chemicals added; Filtrete filtering material will not support the growth of bacteria, mold, mildew or fungi in normal use

Contains electrostatically charged media to filter and attract particles in the air

Attracts and captures large allergens like:

Pollen

Mold spores

Dust mite debris

Attracts and captures microscopic allergens like:

Smoke

Pet dander

Household dust

Smog

* This filter should be changed at least every 3 months. Certain conditions in your home will significantly add particles to the air - this will cause the filter to capture more particles, shortening it's life to less than 3 months. These conditions would include: dirty ductwork, pets, construction work, sanding projects, tobacco smoke, burning candles, fireplaces and wood-burning stoves.

WHY USE MPR RATHER THAN MERV RATING?

The Heating, Ventilating and Air Conditioning (HVAC) industry uses the ASHRAE 52.2 Standard, which assigns a Minimum Efficiency Reporting Value (MERV) to a filter. One part of MERV reports a filter's ability to capture medium to large particles between 1 and 10 microns. This value is helpful in comparing the performance of different filters but it is not adequate alone because particles greater than one micron make up only about 1% of the contaminants in your indoor air.

Another part of MERV addresses submicron particles. 3M calls this the MPR or Microparticle Performance Rating. It measures a filter's ability to capture particles between 0.3 and 1.0 micron. Based on independent laboratory tests, 3M's MPR measures a filter's ability to capture submicron particles that make up 99% of the particles in the air, such as bacteria, smoke and smog.